As well as Trump’s refusal to say whether he would concede the election if he lost, the last debate of 2016 also featured Trump calling Hillary Clinton a “nasty woman.”

The full text of Bush’s letter to Clinton:

Dear Bill,

When I walked into this office just now I felt the same sense of wonder and respect that I felt four years ago. I know you will feel that, too.

I wish you great happiness here. I never felt the loneliness some Presidents have described.

There will be very tough times, made even more difficult by criticism you may not think is fair. I’m not a very good one to give advice; but just don’t let the critics discourage you or push you off course.

You will be our President when you read this note. I wish you well. I wish your family well.